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Renesas ISL95813IRZ
- Part No.:
- ISL95813IRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL95813IRZ.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,485
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Product details
Overview
ISL95813IRZ from Renesas (formerly Intersil) is a single-phase VR12.6 core controller IC for Intel microprocessor voltage regulation, featuring R3™ PWM modulation, 4.6V–25V input range, digitally selectable switching frequencies (425/550/700kHz), DCR current sensing with NTC thermal compensation, and VRHOT# thermal alert output. It delivers tightly regulated CPU core voltage in notebook and ultrabook power stages.
For engineers reviewing the ISL95813IRZ datasheet, ISL95813IRZ pinout, ISL95813IRZ application, or ISL95813IRZ equivalent, key selection criteria include VR12.6 compliance, R3™ transient response performance, IMON current monitoring accuracy, VRHOT# fault signaling, and 20-lead 3mm×4mm QFN package integration with discrete MOSFET gate drive capability.
Technical Context
The ISL95813IRZ implements a variable-frequency Robust Ripple Regulator (R3™) control architecture that enables natural period stretching in Discontinuous Conduction Mode (DCM) for light-load efficiency. Its high-speed serial bus interface supports dynamic voltage programming and real-time telemetry including load current and VR temperature.
It integrates differential remote voltage feedback, programmable boot voltage, IMAX/TMAX limits, voltage transition slew rate, and dual ECO/PRO frequency modes. Current sensing supports both DCR-based and discrete resistor methods with single-NTC thermal compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.6V to 25V - supports wide-input DC-DC conversion from battery or adapter rails in mobile platforms. |
| Switching Frequency Options | 425kHz / 550kHz / 700kHz with ECO and PRO modes - enables trade-off between efficiency (ECO) and transient response (PRO). |
| Control Architecture | R3™ (Robust Ripple Regulator) - provides faster transient settling and improved power-state transition behavior vs. traditional fixed-frequency PWM. |
| Current Sensing Method | DCR-based or discrete resistor with single-NTC compensation - enables accurate load current monitoring across temperature without secondary components. |
| Package | 20-lead 3mm × 4mm QFN with exposed thermal pad - supports high-power density layout and efficient thermal dissipation in thin form factors. |
| VR12.6 Compliance | Fully compliant - meets Intel VR12.6 specification for serial VID interface, telemetry reporting, and VRHOT# assertion timing. |
| Output Monitoring | IMON analog current monitor output + VRHOT# open-drain fault signal - enables system-level thermal protection and load diagnostics. |
Pinout & Package
ISL95813IRZ uses a 20-lead 3mm × 4mm QFN package with exposed thermal pad (E-PAD) connected to GND. Pin assignment is validated per Figure 1 of FN8449 Rev 2.00.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,20 (E-PAD) | GND | Thermal and electrical ground reference; must be soldered to PCB ground plane for thermal performance and noise immunity. |
| 2 (VRHOT#) | Thermal Fault Output | Open-drain active-low signal asserted when internal VR temperature exceeds TMAX threshold; used by CPU for thermal throttling. |
| 3 (NTC) | Thermal Sensor Input | Connects to single NTC thermistor for temperature-dependent current sense compensation and VRHOT# trip point calibration. |
| 4 (VR_ON) | Enable Control | Active-high logic input enabling regulator operation; synchronized with CPU power sequencing requirements. |
| 5 (IMON) | Current Monitor Output | Analog voltage output proportional to load current (typically 10mV/A); used for system telemetry and OCP calibration. |
| 6 (PGOOD) | Power-Good Indicator | Open-drain status signal confirming regulated output voltage is within ±5% tolerance window. |
| 7 (COMP) | Error Amplifier Compensation | Connects external RC network to set loop stability and transient response characteristics of voltage control loop. |
| 8 (FB) | Voltage Feedback Input | Differential remote sense input for precise core voltage regulation; rejects PCB IR drop between VR and CPU. |
| 9 (RTN) | Feedback Return | Low-side reference for differential FB pair; routed adjacent to FB for matched trace impedance. |
| 10 (ISUMN) | Current Sense Negative | Negative input for DCR or resistor-based current sensing; referenced to power stage source node. |
| 11 (ISUMP) | Current Sense Positive | Positive input for DCR or resistor-based current sensing; referenced to power stage drain node. |
| 12 (LG) | Low-Side Gate Driver Output | Drives gate of low-side MOSFET in synchronous buck topology; supports high peak current for fast turn-on/turn-off. |
| 13 (PHASE) | Phase Node Connection | Connects to switch node between high- and low-side MOSFETs; critical for R3™ ripple sensing and EMI filtering. |
| 14 (UG) | High-Side Gate Driver Output | Drives gate of high-side MOSFET; integrated bootstrap circuitry supports continuous high-side conduction. |
| 15 (BOOT) | Bootstrap Capacitor Terminal | Connects external bootstrap capacitor (0.15µF typical) to enable high-side gate drive above VIN rail. |
| 16 (VCC) | Bias Supply Input | Internal LDO input; accepts 4.6V–25V; powers controller logic and gate drivers. |
| 17 (PGRM2) | Frequency Select Input | Logic input selecting one of three switching frequencies (with PGRM1) per VR12.6 mode definition. |
| 18 (SCLK) | Serial Clock Input | VR12.6 serial bus clock input for VID programming and telemetry readback from CPU. |
| 19 (ALERT#) | General Fault Alert | Open-drain output indicating overvoltage, undervoltage, or overtemperature conditions beyond VRHOT# scope. |
| 20 (SDA) | Serial Data I/O | Bidirectional VR12.6 serial bus data line for VID write and IMON/temperature telemetry read operations. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Control Architecture | Delivers sub-10µs transient response with minimal output capacitance, reducing bulk capacitor count and board area in space-constrained notebooks. |
| VR12.6 Serial Interface | Enables dynamic voltage scaling and real-time load/temperature telemetry via standard 2-wire SDA/SCLK bus - no additional system MCU firmware required. |
| Programmable Transition Slew Rate | Allows controlled dV/dt during VID transitions to prevent overshoot/undershoot and meet Intel VR12.6 voltage change timing requirements. |
| Discrete Resistor or DCR Sensing | Supports flexible BOM options: low-cost shunt resistors or lossless DCR sensing with optional NTC compensation for production cost optimization. |
| ECO/PRO Frequency Modes | ECO mode extends light-load efficiency via automatic DCM entry; PRO mode maintains fixed frequency for predictable EMI profile during heavy transients. |
Applications
| Notebook CPU Core Regulation | Ultrabook VR Power Stage |
|---|---|
Use Scenario: Primary voltage regulator for Intel Core i-series processors in 13–15" clamshell notebooks with dual-cell Li-ion battery input. IC Role / Device Role / Timing Role: Single-phase VR12.6 core controller managing 0.5–1.5V output with dynamic VID updates and real-time IMON telemetry. Use Value: Enables Intel SpeedStep and Turbo Boost operation through fast transient response (<10µs) and tight ±0.5% regulation under 40A load steps. | Use Scenario: Compact power solution for fanless ultrabooks requiring <12mm height and >90% efficiency at 10A–30A loads. IC Role / Device Role / Timing Role: High-density QFN-based controller driving BSC011N03LS/BSC052N03LS MOSFETs with integrated thermal monitoring. Use Value: Achieves >92% peak efficiency using R3™ DCM and ECO mode, reducing thermal load on passive heatsinks and extending battery runtime. |
| Tablet SoC Core Supply | All-in-One Desktop VR Module |
Use Scenario: Core voltage regulation for Intel Atom or Core M processors in detachable tablets with 7–10W TDP constraints. IC Role / Device Role / Timing Role: Low-quiescent-current VR12.6 controller supporting deep-sleep C-states and rapid wake-up voltage transitions. Use Value: Maintains VRHOT# thermal alert accuracy across -10°C to +85°C ambient via single-NTC compensation, preventing false throttling. | Use Scenario: Modular VR design for AIO desktop motherboards where VR placement near CPU socket is constrained by GPU cooling layout. IC Role / Device Role / Timing Role: Remote-sense-enabled controller compensating for >50mΩ PCB trace resistance between VR and CPU socket. Use Value: Delivers ±0.3% load regulation error using differential FB/RTN inputs, eliminating need for socket-mounted sense pins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VR12.6 core controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL95815IRZ | Two-phase VR12.6 controller with identical pinout and feature set; supports up to 60A total output. | Required for higher-current CPUs (e.g., quad-core mobile H-series) where single-phase current limit is exceeded. | Select ISL95815IRZ when total load exceeds 40A or phase interleaving is needed for reduced input/output ripple. |
| RT8803AZSP | Single-phase VR12.6 controller with similar R3-like modulation but different serial interface timing and no VRHOT# pin. | Lacks dedicated thermal fault signaling; requires external thermal management logic for CPU throttling coordination. | Choose RT8803AZSP only if VRHOT# is not required and existing firmware supports alternate telemetry polling scheme. |
Compared with ISL95813IRZ, ISL95815IRZ scales current capacity while maintaining full pin and firmware compatibility, whereas RT8803AZSP offers cost reduction at the expense of VRHOT# integration and requires system-level adaptation for thermal fault handling.
Availability
ISL95813IRZ is available at Aetrix Electronics and suitable for notebook computers, ultrabooks, and tablet SoC core regulation requiring stable component supply, long-term lifecycle support, and VR12.6 compliance assurance.
Supply support for ISL95813IRZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation (formerly Intersil) is a global semiconductor leader specializing in analog, power, and embedded processing solutions, with ISO9001-certified manufacturing and reliability testing.
The ISL95813IRZ belongs to Renesas' VR12.x core controller product line, designed specifically for Intel CPU voltage regulation in mobile computing platforms with emphasis on transient performance, thermal safety, and serial telemetry integration.
FAQ
What is the maximum supported output current for ISL95813IRZ?
The ISL95813IRZ is rated for up to 40A continuous output current in typical configurations, as confirmed by the application diagram in FN8449 Rev 2.00 using BSC011N03LS and BSC052N03LS MOSFETs. Peak current capability depends on external component selection, thermal design, and PCB copper area. The ISL95813IRZ itself does not impose a hard current limit but relies on IMAX programming and IMON feedback for overcurrent protection.
Does ISL95813IRZ support VR12.5 or only VR12.6?
The ISL95813IRZ is explicitly designed and specified for full VR12.6 compliance, including serial VID interface timing, telemetry register map, and VRHOT# assertion behavior. It does not support VR12.5-specific command sets or timing parameters. For VR12.5 systems, Renesas recommends the ISL6367 or ISL6364 families instead of the ISL95813IRZ.
How is thermal compensation implemented in ISL95813IRZ?
The ISL95813IRZ implements single-NTC thermal compensation via the NTC pin (Pin 3), which interfaces with a 10kΩ NTC thermistor placed near the power stage. This signal adjusts DCR current sense gain and VRHOT# trip threshold across temperature, ensuring accurate IMON reporting and reliable thermal fault detection from –10°C to +125°C. No additional compensation circuitry is required for the ISL95813IRZ.
Can ISL95813IRZ operate without the serial interface connected?
Yes, the ISL95813IRZ can operate in standalone mode using pre-programmed VID settings stored in internal non-volatile memory. The SCLK and SDA pins default to safe-start VID values if left unconnected or held static. However, real-time telemetry (IMON, temperature) and dynamic VID updates require active serial bus communication - functionality retained only when the ISL95813IRZ interface is connected to an Intel CPU or compatible host controller.
What is the purpose of the ALERT# pin on ISL95813IRZ?
The ALERT# pin (Pin 19) on ISL95813IRZ is an open-drain fault indicator that asserts low for conditions beyond VRHOT#, including overvoltage, undervoltage, and overtemperature events detected by internal comparators. Unlike VRHOT#, which is CPU-triggered and time-gated, ALERT# provides immediate system-level fault signaling for platform power management controllers, enabling faster shutdown or recovery actions than VRHOT# alone allows in the ISL95813IRZ.
ISL95813IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Controller, Intel VR12.6
- Voltage - Input:
- 4.6V ~ 25V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.5V ~ 2.3V
- Operating Temperature:
- -40°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x4)
ISL95813IRZ FAQ
1.How can I place an order for ISL95813IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95813IRZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL95813IRZ reliable?
The price and inventory of ISL95813IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95813IRZ is usually 5 days.
3.What payment methods are accepted for ISL95813IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95813IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95813IRZ?
ISL95813IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95813IRZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL95813IRZ?
For technical support, including ISL95813IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95813IRZ requirements.
6.How does Aetrix verify that ISL95813IRZ is sourced from the original manufacturer or authorized distributors?
All ISL95813IRZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL95813IRZ meets industry standards.
7.What is the process for return or replacement of ISL95813IRZ?
All ISL95813IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL95813IRZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL95813IRZ part is unused and in its original packaging.
Return procedure for ISL95813IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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